Start small. A sunscreen or a single cleanser is an easy way in that doesn't ask him to learn a whole routine overnight.
The Tea Tree range is built for exactly that. The pore clarifying cleanser is the simplest place to start.
No. One well-picked product is a complete gift on its own. Don't overthink it.
Yep, the full range here ships online, and every product page spells out exactly what it's for.
Grab a sunscreen or a single active. Both work fine without needing him to change anything else about his routine.